Current Conditions

Grayslake, Illinois

59°F15°C

Partly Cloudy

Wind

ENE 11 mph18 km/h

Humidity

75%

Cloud Cover

50%

As of Tuesday, September 22, 2026 at 10:20 PM CDT

Today's Outlook

Night

Mostly cloudy, with a low around 57°F14°C. Breezy from the ENE at 9 to 11 mph15 to 18 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 63°F17°C	Low 56°F13°C	Precip 0 in0 mm—	Cloud 64%	Wind ENE 10 mph16 km/h	Wednesday: Mostly cloudy and mild, with a high of 63°F17°C and morning low of 56°F13°C. Breezy from the NE at 11 to 12 mph18 to 19 km/h. Wednesday Night: Mostly cloudy, with a low around 57°F14°C. Breezy from the ENE at 9 to 11 mph15 to 18 km/h.
Partly Cloudy	High 64°F18°C	Low 57°F14°C	Precip 0 in0 mm—	Cloud 42%	Wind ENE 7 mph12 km/h	Thursday: Partly cloudy and mild, with a high of 64°F18°C and morning low of 57°F14°C. Breezy from the ENE at 8 to 9 mph13 to 14 km/h. Thursday Night: Partly cloudy, with a low around 58°F14°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h.
Partly Cloudy	High 65°F18°C	Low 59°F15°C	Precip 0 in0.1 mm6%	Cloud 79%	Wind E 6 mph9 km/h	Friday: Mostly cloudy and mild, with a high of 65°F18°C and morning low of 59°F15°C. Breezy from the E at 6 to 7 mph10 to 12 km/h. Friday Night: Mostly cloudy, with a low around 59°F15°C. Light wind from the E around 6 mph9 km/h.
Partly Cloudy	High 66°F19°C	Low 57°F14°C	Precip 0.01 in0.2 mm4%	Cloud 79%	Wind E 6 mph10 km/h	Saturday: Overcast and mild, with a high of 66°F19°C and morning low of 57°F14°C. Light wind from the ESE around 6 mph10 km/h. Saturday Night: Mostly cloudy, with a low around 58°F15°C. Light wind from the E around 6 mph9 km/h.
Drizzle	High 68°F20°C	Low 57°F14°C	Precip 0.03 in0.8 mm17%	Cloud 69%	Wind ENE 4 mph7 km/h	Sunday: Mostly cloudy and warm, with a high of 68°F20°C and morning low of 57°F14°C. Light wind from the ENE around 4 mph7 km/h. 17% chance of drizzle in the morning. Sunday Night: Mostly cloudy, with a low around 58°F15°C. Light wind from the ENE around 4 mph7 km/h. 15% chance of drizzle before dawn.
Clear	High 70°F21°C	Low 56°F14°C	Precip 0 in0 mm—	Cloud 33%	Wind NE 4 mph7 km/h	Monday: Partly cloudy and warm, with a high of 70°F21°C and morning low of 56°F14°C. Light wind from the NE around 4 mph6 km/h. Monday Night: Partly cloudy, with a low around 57°F14°C. Light wind from the ENE around 5 mph8 km/h.
Light Rain	High 71°F22°C	Low 57°F14°C	Precip 0.06 in1.5 mm27%	Cloud 76%	Wind SSE 7 mph11 km/h	Tuesday: Overcast and warm, with a high of 71°F22°C and morning low of 57°F14°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h. 10% chance of drizzle in the afternoon. Tuesday Night: Mostly cloudy, with a low around 58°F14°C. Breezy from the SSE at 7 to 9 mph11 to 14 km/h. 27% chance of light rain in the evening.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	63°F17°C	56°F13°C	0 in0 mm· —	64%	Partly Cloudy	ENE 10 mph16 km/h
DayMostly cloudy and mild, with a high of 63°F17°C and morning low of 56°F13°C. Breezy from the NE at 11 to 12 mph18 to 19 km/h. NightMostly cloudy, with a low around 57°F14°C. Breezy from the ENE at 9 to 11 mph15 to 18 km/h.
	ThursdaySep 24	64°F18°C	57°F14°C	0 in0 mm· —	42%	Partly Cloudy	ENE 7 mph12 km/h
DayPartly cloudy and mild, with a high of 64°F18°C and morning low of 57°F14°C. Breezy from the ENE at 8 to 9 mph13 to 14 km/h. NightPartly cloudy, with a low around 58°F14°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h.
	FridaySep 25	65°F18°C	59°F15°C	0 in0.1 mm· 6%	79%	Partly Cloudy	E 6 mph9 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 59°F15°C. Breezy from the E at 6 to 7 mph10 to 12 km/h. NightMostly cloudy, with a low around 59°F15°C. Light wind from the E around 6 mph9 km/h.
	SaturdaySep 26	66°F19°C	57°F14°C	0.01 in0.2 mm· 4%	79%	Partly Cloudy	E 6 mph10 km/h
DayOvercast and mild, with a high of 66°F19°C and morning low of 57°F14°C. Light wind from the ESE around 6 mph10 km/h. NightMostly cloudy, with a low around 58°F15°C. Light wind from the E around 6 mph9 km/h.
	SundaySep 27	68°F20°C	57°F14°C	0.03 in0.8 mm· 17%	69%	Drizzle	ENE 4 mph7 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 57°F14°C. Light wind from the ENE around 4 mph7 km/h. 17% chance of drizzle in the morning. NightMostly cloudy, with a low around 58°F15°C. Light wind from the ENE around 4 mph7 km/h. 15% chance of drizzle before dawn.
	MondaySep 28	70°F21°C	56°F14°C	0 in0 mm· —	33%	Clear	NE 4 mph7 km/h
DayPartly cloudy and warm, with a high of 70°F21°C and morning low of 56°F14°C. Light wind from the NE around 4 mph6 km/h. NightPartly cloudy, with a low around 57°F14°C. Light wind from the ENE around 5 mph8 km/h.
	TuesdaySep 29	71°F22°C	57°F14°C	0.06 in1.5 mm· 27%	76%	Light Rain	SSE 7 mph11 km/h
DayOvercast and warm, with a high of 71°F22°C and morning low of 57°F14°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h. 10% chance of drizzle in the afternoon. NightMostly cloudy, with a low around 58°F14°C. Breezy from the SSE at 7 to 9 mph11 to 14 km/h. 27% chance of light rain in the evening.
	WednesdaySep 30	67°F19°C	61°F16°C	0.39 in9.8 mm· 36%	82%	Light Rain	S 9 mph15 km/h
DayOvercast and mild, with a high of 67°F19°C and morning low of 61°F16°C. Breezy from the S at 10 mph15 km/h. 36% chance of light rain throughout the day. NightOvercast, with a low around 62°F17°C. Breezy from the S at 9 mph14 km/h. 36% chance of light rain throughout the night.
	ThursdayOct 1	67°F19°C	58°F15°C	0.2 in5 mm· 27%	65%	Showers	W 9 mph15 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 58°F15°C. Breezy from the WNW at 10 mph15 km/h. 27% chance of showers throughout the day. NightMostly cloudy, with a low around 59°F15°C. Breezy from the W at 9 mph14 km/h. 27% chance of showers throughout the night.
	FridayOct 2	67°F19°C	57°F14°C	0.12 in3.1 mm· 19%	60%	Showers	WSW 9 mph14 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 57°F14°C. Breezy from the WSW at 9 mph14 km/h. 18% chance of drizzle throughout the day. NightMostly cloudy, with a low around 58°F14°C. Breezy from the WSW at 8 to 9 mph13 to 14 km/h. 19% chance of showers throughout the night.
	SaturdayOct 3	67°F20°C	57°F14°C	0.11 in2.8 mm· 21%	65%	Showers	SW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 57°F14°C. Breezy from the SW at 9 to 10 mph15 to 17 km/h. 21% chance of drizzle throughout the day. NightMostly cloudy, with a low around 58°F14°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h. 20% chance of showers throughout the night.
	SundayOct 4	65°F18°C	56°F13°C	0.16 in4.1 mm· 21%	60%	Showers	WSW 10 mph17 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 56°F13°C. Breezy from the W at 11 mph17 km/h. 21% chance of showers throughout the day. NightMostly cloudy, with a low around 58°F14°C. Breezy from the WSW at 10 mph16 km/h. 18% chance of showers throughout the night.
	MondayOct 5	64°F18°C	53°F12°C	0.11 in2.9 mm· 20%	54%	Showers	W 10 mph16 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 53°F12°C. Breezy from the W at 10 to 11 mph17 to 17 km/h. 17% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 55°F13°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 20% chance of showers throughout the night.
	TuesdayOct 6	65°F19°C	52°F11°C	0.06 in1.6 mm· 14%	45%	Drizzle	W 9 mph15 km/h
DayPartly cloudy and mild, with a high of 65°F19°C and morning low of 52°F11°C. Breezy from the W at 10 mph16 km/h. 11% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 54°F12°C. Breezy from the W at 9 mph15 km/h. 14% chance of drizzle throughout the night.
	WednesdayOct 7	64°F18°C	52°F11°C	0.09 in2.4 mm· 14%	45%	Showers	NW 10 mph16 km/h
DayPartly cloudy and mild, with a high of 64°F18°C and morning low of 52°F11°C. Breezy from the NW at 10 mph16 km/h. 14% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 53°F12°C. Breezy from the WNW at 9 to 10 mph15 to 16 km/h. 13% chance of showers throughout the night.

Nearby Cities

Round Lake3 mi4 km Round Lake Beach3 mi5 km Mundelein6 mi10 km Libertyville6 mi10 km Gurnee7 mi12 km Vernon Hills9 mi15 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 42.3445°N, 88.0417°W·Elevation: 239m·Timezone: America/Chicago·Population: 20,915